The spelling of the word "INFBETA" reflects its pronunciation using the IPA phonetic transcription. The initial letters "INF" represent the sound /ɪnf/ as in "information", followed by the consonant sound /b/, and the vowel sound /ɛ/ as in "pet". The final letters "ETA" represent the sound /eɪtə/ as in "beta". The combination of these sounds creates the unique pronunciation of the word "INFBETA", which can be transcribed in IPA as /ɪnfˈbɛtə/.